37Consequently, where a modification meets the condition laid down in point (a) of the first subparagraph of Article 30(4) of Regulation No 1260/1999, in that it affects the nature or implementation conditions of an operation, that modification may be classified as a ‘substantial modification’ for the purposes of Article 30(4) of that regulation only if it significantly reduces the capacity of the operation at issue to attain its designated objective.
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